|Topic Review (Newest First)|
|12-20-2008 10:35 AM|
|WanderingStar||Try the ballast. It's a cheap, easy solution. I've had success with small changes. A couple of gallon bottles in the bottom of a sailing canoe makes a big difference. Even moving the anchor and chain off the cabin top made a difference.|
|12-19-2008 09:25 PM|
Rather than play with the design I think you're better off to adapt to the boat's characteristics and reef a bit sooner. I really don't think that a couple of hundred pounds is going to make a seriously noticeable difference in how this boat handles. Do you sense a difference when the water tank is full vs empty?
By today's standards a 40% ballast ratio is pretty good. Smart handling, steering and sail selection will go a long ways to dealing with your 'problem'.
|12-19-2008 07:37 PM|
Ballasting: the numbers
The displacement of the Hunter 25.5 is 4500 lbs, keel weight is 1800 lbs, and draft is 4.5 ft. That suggests a ballast to weight ratio of 0.4, which sounds high to me at first glance. Do such numbers suggest any certainty that there will be significant reduction of heeling with the addition of, say anywhere from 120 to 180 lbs. of ballast in the bilge?
|12-19-2008 07:31 PM|
Ballasting: the numbers
The displacement of the Hunter 25.5 is 4500 lbs, keel weight is 1800 lbs, and draft is 4.5 ft. That suggests a ballast to weight ratio of 0.4, which sounds high to me at first glance. Do thesebers suggest significant heeling reduction with the addition of, say 150 lbs. in the bilge?
|12-19-2008 01:34 PM|
The degree to which it will affect the boat is largely dependent upon the boat's displacement. What is the designed displacement of the boat ? What is the ballast to displacement ratio ? Under 30% Over 40% ??? If you have a boat that weighs 10,000 pounds, of which 3 or 4000 pounds is ballast 150 pounds is going to make a difference but not a significant one.
The added weight means it will take the boat longer to pick up speed but it also means it will take the boat longer to slow down. Inertia being what it is ...
|12-16-2008 04:37 PM|
Yes, we have a CD jib furler that works well and one reef point in the main with a fast reef line rigged to the cockpit. But when we're getting overpowered there is seldom enough time to reef; What I do is ease the main sheet so the boom rises a bit and we lose a bit of drive to windward. I know that 150 or so lbs of bilge ballasting will help. The real question is: will it be appreciable?
|12-16-2008 04:02 PM|
Load 'er up!
A side-by-side test would show a slightly slower acceleration, particularly in light air, but we're talking slight, where the extra weight will help the boat stand up more against the wind, thus making her a bit faster and the main benefit, easier to handle. You didn't mention reefing, etc. Is that in play, and if so, to what degree?
|12-15-2008 06:10 PM|
First, my thanks to those of you who responded so promptly. So far it's been constructive. You who added ballast down inside your ballast keel were lucky because the moment arm and, therefore, righting effect, are both greater. My Hunter with a draft of 4.5 feet has a solid, narrow cast iron keel with superficial rust (I sail in fresh water) so the sand bags will go atop it in the bilge. I also appreciate the guy who pointed out to me the added weight of engine mount, tank, etc for the saildrive; it suggests that perhaps 3 sandbags of 60 lbs would not be unreasonable. Next question: will 150-180 lbs of ballast materially slow down the boat? We race in season actively on the Hudson River.
|12-15-2008 05:52 PM|
|sailboy21||I think there might be more inertial stability in the motor versions. Not much, but a little. Maybe a little more due to the engine acting as ballast. Smaller boats are very sensitive to weight. Also, keep in mind 120lbs might be on the light side. You should also include the weight of the added glass work for the engine bed & tank. Probably a lot more fuel capacity that you have for your OB. I would venture to say the two versions could very likely have slightly different sailing characteristics.|
|12-15-2008 04:49 PM|
I would doubt that 120 lbs in sandbags will make much of a difference in stability. 120 lbs of low density ballast placed near the centerline of a boat like the Hunter would not noticably increase stability. My sense is that the Hunter 25.5 was probably designed to use a working jib in over 12 knots of and that you may be using too large a headsail for the conditions.
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